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stm32串口1和串口2初始化程序分享

1624 STM32

问答对人有帮助，内容完整，我也想知道答案 0 STM32串口1和串口2初始化程序分享 0
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答案对人有帮助，有参考价值 0 void USART1_Initialise(u32 bound) { //GPIO端口设置 GPIO_InitTypeDef GPIO_InitStructure; USART_InitTypeDef USART_InitStructure; NVIC_InitTypeDef NVIC_InitStructure; RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1\|RCC_APB2Periph_GPIOA\|RCC_APB2Periph_AFIO, ENABLE); //USART1_TX PA.9 GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9; GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP; GPIO_Init(GPIOA, &GPIO_InitStructure); //USART1_RX PA.10 GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10; GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPU; GPIO_Init(GPIOA, &GPIO_InitStructure); //Usart1 NVIC 配置 NVIC_InitStructure.NVIC_IRQChannel = USART1_IRQn; NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority=3 ; NVIC_InitStructure.NVIC_IRQChannelSubPriority = 3; // NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; //IRQ通道使能 NVIC_Init(&NVIC_InitStructure); //根据NVIC_InitStruct中指定的参数初始化外设NVIC寄存器USART1 //USART 初始化设置 USART_InitStructure.USART_BaudRate = bound;//一般设置为9600; USART_InitStructure.USART_WordLength = USART_WordLength_8b; USART_InitStructure.USART_StopBits = USART_StopBits_1; USART_InitStructure.USART_Parity = USART_Parity_No; USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None; USART_InitStructure.USART_Mode = USART_Mode_Rx \| USART_Mode_Tx; USART_Init(USART1, &USART_InitStructure); USART_ITConfig(USART1, USART_IT_RXNE, ENABLE);//开启中断 USART_Cmd(USART1, ENABLE); //使能串口 } void USART2_Initialise( u32 bound ) { GPIO_InitTypeDef GPIO_InitStructure;//I/O?ú3?ê??ˉ?á11ì? NVIC_InitTypeDef NVIC_InitStructure;//?D??3?ê??ˉ?á11ì? USART_InitTypeDef USART_InitStructure;//′??ú3?ê??ˉ?á11ì? /* Enable the USART2 Pins Software Remapping / RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA\|RCC_APB2Periph_AFIO, ENABLE); RCC_APB1PeriphClockCmd(RCC_APB1Periph_USART2\|RCC_APB2Periph_AFIO, ENABLE); / Configure USART2 Rx (PA.03) as input floating / GPIO_InitStructure.GPIO_Pin = GPIO_Pin_3; GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPU; GPIO_Init(GPIOA, &GPIO_InitStructure); / Configure USART2 Tx (PA.02) as alternate function push-pull / GPIO_InitStructure.GPIO_Pin = GPIO_Pin_2; GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP; GPIO_Init(GPIOA, &GPIO_InitStructure); / Enable the USART2 Interrupt / NVIC_InitStructure.NVIC_IRQChannel = USART2_IRQn; NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 3; NVIC_InitStructure.NVIC_IRQChannelSubPriority = 3; NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; NVIC_Init(&NVIC_InitStructure); USART_InitStructure.USART_BaudRate = bound; USART_InitStructure.USART_WordLength = USART_WordLength_8b; USART_InitStructure.USART_StopBits = USART_StopBits_1; USART_InitStructure.USART_Parity = USART_Parity_No; USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None; USART_InitStructure.USART_Mode = USART_Mode_Rx \| USART_Mode_Tx; USART_Init(USART2, &USART_InitStructure); USART_ITConfig(USART2, USART_IT_RXNE, ENABLE); / Enable USART2 */ USART_Cmd(USART2, ENABLE); } void USART2_IRQHandler(void) { if(USART_GetFlagStatus(USART2, USART_FLAG_RXNE) == SET) { //USART_SendData(USART2, USART_ReceiveData(USART2)); } } void USART1_IRQHandler(void) //串口2中断服务程序 { if(USART_GetITStatus(USART1, USART_IT_RXNE) != RESET) { } }

2021-12-16 09:34:46 评论举报陈铮